title: Calorimetric studies of Cu-Li, Li-Sn, and Cu-Li-Sn.
abstract: Integral molar enthalpies of mixing were determined by drop calorimetry for Cu-Li-Sn at 1073 K along five sectionsxCu/xSn≈ 1:1,xCu/xSn≈ 2:3,xCu/xSn≈ 1:4,xLi/xSn≈ 1:1, andxLi/xSn≈ 1:4. The integral and partial molar mixing enthalpies of Cu-Li and Li-Sn were measured at the same temperature, for Li-Sn in addition at 773 K. All binary data could be described by Redlich-Kister-polynomials. Cu-Li shows an endothermic mixing effect with a maximum in the integral molar mixing enthalpy of ∼5300 J · mol-1atxCu= 0.5, Li-Sn an exothermic minimum of ∼ -37,000 J · mol-1atxSn∼ 0.2. For Li-Sn no significant temperature dependence between 773 K and 1073 K could be deduced. Our measured ternary data were fitted on the basis of an extended Redlich-Kister-Muggianu model for substitutional solutions. Additionally, a comparison of these results to the extrapolation model of Chou is given.
authors.affiliation: Department of Inorganic Chemistry/Materials Chemistry, University of Vienna, Währingerstraße 42, 1090 Vienna, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Fürtauer
authors.forename: E
authors.initials: E
authors.lastname: Tserenjav
authors.forename: A
authors.initials: A
authors.lastname: Yakymovych
authors.forename: H
authors.initials: H
authors.lastname: Flandorfer
keywords: Cu–Li; Cu–Li–Sn; Drop calorimetry; Li–Sn; Molar mixing enthalpy